From the beginning of winter 2020 about 27 million people have had coronavirus. However, many people still do not know if it is possible to become infected more than once. Is immunity developed after coronavirus? How to protect yourself from infection? Let’s figure it out.
Is there immunity to coronavirus?
Epidemiologists say that for some time after recovery, it is impossible to become infected with coronavirus again. But it doesn’t mean that immunity will develop forever. It all depends on the antibodies to the disease that the human body produces.
Immunity to coronavirus in those who have been ill depends on the complexity of the disease form. Coronavirus antibodies immunity is usually not as effective in patients with mild illness as after severe form. Besides, the more time has passed since your recovery, the weaker your immune response will be.
Scientists have also found that specific antibodies are produced even in people who have had coronavirus without symptoms. The concentration of these antibodies is the highest among all cases. But how much time will immunity after coronavirus take? Recent researches show that three months after recovery, the antibody concentration is halved. So we can only approximately determine how long immunity lasts after coronavirus.
Immunity is preserved after coronavirus. But what if an immunity to coronavirus exists before the disease? This is also possible. Some people have antibodies to the MERS pathogen. This virus appeared in 2012 and has a very similar structure to the current SARS-CoV-2. That is why MERS antibodies can effectively form immunity to COVID-19.
Is there a vaccine for coronavirus? This is another important question. There is no 100% vaccine yet. But by studying antibodies and the way the immune system works, researchers are getting closer to solve this issue.
Why are antibody tests needed?
The presence of antibodies in the blood that the immune system has developed in the fight against the virus is determined by a special test. With the help of antibody tests, it’s possible to establish the real number of patients with coronavirus.
For this, blood is taken from the patient and mixed with a reagent. If the sample gets a different color, this means that the person has already been ill and has developed immunity to coronavirus. The presence of antibodies does not preclude reinfection. However, the probability of infection is ten times lower than in the case of the absence of antibodies.
Such tests make it possible to establish the amount of people that have already had asymptomatic COVID-19 or with symptoms of various forms. They also show if this is enough to form collective immunity after coronavirus.
While this topic is still being studied, it is important to prevent the spread of the infection. Take precautions in public places and strengthen your body. If you observe symptoms of coronavirus, go to self-isolation and seek medical help.